Serial port pinouts

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Revision as of 07:31, 30 April 2010

If anyone has any photos or diagrams, please upload them to the wiki (NOT link to an external image) and add them to this page.

For those interested: (--------- is nearest board edge)

Buffalo WBR2-G54(S)

----------
J5
o gnd
o vcc
o rx
o tx

Motorola WR850G v2 /v3

| tx o o vcc  RJP1
|    o o
|    o o gnd
| rx o o
|    o

Buffalo WLA2-G54C

| tx o o
|    o o vcc
|    o o gnd
| rx o o
|    o
---------

Buffalo WHR-G54S

Connector RJP1

 tx o o      |
    o o vcc  |
    o o gnd  |
 rx o o      |
    o        |
-------------

The serial port runs at 115200 baud, 8 bits, no parity, 1 stop bit using ANSI terminal emulation.

Buffalo WHR-HP-G54

Connector J1

             |
      rx o   |
      tx o   |
     gnd o   |
     vcc o   |
-------------

The serial port runs at 115200 baud, 8 bits, no parity, 1 stop bit using ANSI terminal emulation. Levels are not RS232 voltage levels, but +3.3V TTL logic. Use level shifter (Max232/Max3232/DS275 etc.) to correct this. Also a USB to serial phone cable will work in most cases. A cable with a Prolific 2303 works fine to access the router as a device (Eg. to get a bootloader commandline). It does not work in host mode to control USB devices. The VCC pin puts out 3.3V.

Buffalo WHR-G125

Connector J1

|            
|     rx  o   
|     tx  o   
|    gnd o   
|    vcc o 
-------------

The serial port runs at 115200 baud, 8 bits, no parity, 1 stop bit using ANSI terminal emulation. Levels are not RS232 voltage levels, but +3.3V TTL logic. Use level shifter (Max232/Max3232/DS275 etc.) to correct this. Also a USB to serial phone cable will work in most cases. A cable with a Prolific 2303 works fine.

Linksys WRT-54G(S,L)

JP1 or JP2 (on newer models)

vcc 1-2 vcc |
tx1 3-4 tx0 |
rx1 5-6 rx0 |
... 7-8 ... |
gnd 9-10 gnd |

(numbering as shown on the PCB at JP2 in my WRT54GL v1.1, Rockus 10:42, 25 May 2008 (CEST))

below numbering shown on my WRT-54GS V1 with JP1 busstopgangsta 11.11.2008 00:16 GMT+1

Linksys WRT-350N v 2.0

J5

vcc o
tx1 o 
rx1 o 
gnd o

Asus WL-500 deluxe

|     o o
| gnd o o vcc
| tx1 o o tx0
| rx1 o o rx0   
|        J5

Sparklan WX6615GT

| 　　　o
| gnd o o rx
| gnd o o 
| vcc o o 
| vcc o o tx   
|        J5

Airlink AR430W

Dynex DX-NRUTER

Dlink DIR-300 revb

NOTE: RevB is completely different hardware, based on Ralink RT3050 SoC. The serial port runs at 57600 baud, 8 bits, no parity, 1 stop bit using ANSI terminal emulation. Levels are not RS232 voltage levels, but +3.3V TTL logic. Use an interface converter chip (Max232/Max3232/DS275 etc.) to connect to standard RS-232.

TP-Link TL-WR941ND ver.3

Connector P1 (see picture)

                |
      tx o    |
      rx o    |
     gnd o   |
     vcc o   |

Login: "ap71"

Optional login: "root" Password: "5up"

The serial port runs at 115200 baud, 8 bits, no parity, 1 stop bit using ANSI terminal emulation. Levels are not RS232 voltage levels, but +3.3V TTL logic. Use level shifter (Max232/Max3232/DS275 etc.) to correct this. Also a USB to serial phone cable will work in most cases. A cable with a Prolific 2303 works fine. You have to short R356, if not, the TX will not going to work.

External Links

• Original source of this page on the DD-WRT forums